Cindy Carol

Professor Leaf, an absent-minded poet with a prejudice against the sciences, is forced to face the fact that his son is a math prodigy with little artistic talent of his own. (imdb)

Francis, now 17, is still in love with Moondoggy. She can persuade her parents to allow them a journey to Rome, together with two of her and two of his friends. However they have to take an adult with them, so they choose Peter's eccentric aunt. In Rome they get the beautiful guide Daniela, who's fascinating the guys and making especially Gidget jealous. She starts looking elsewhere herself. (imdb)